Here we go again
NO, you can't system transffer them, for some odd reason it will not work.
NO, it doesn't work from Emunand 9.7 to Sysnand 9.7 system transffer,
NO, it will not work from Sysnand 9.2 updated to sysnand 9.7 and then system transffered to another sysnand 9.7 system
Yes, it will work from Emunand to Emunand system transffer
Yes, if you bought a console with a pre-installed game, you can system transffer that game and if you bought all consoles with pre-installed games and set 1 up and system transffer it every time to another one with pre-installed games, you can have all pre-installed games on 1 console in the end that you can system transffer every time again
And it doesn't matter if you link a NNID or not, the result stays the same as above
You can go only back to 6.1 (or whatever 9.2 and lower) on your hackable 3DS system, as long as you have a NAND backup and a hardmod
If you system transffer your Sysnand 9.7 XL to your other hackable 3DS, you can't install any cia as it will be on 9.7 and there'rs no way you can install cia's on 9.7 to beging with, you can however system transffer your XL to emunand, but legit cia's need to be installed on sysnand to stay legit, then make an emunand out of that